Author: KarinsDad
Date: 15:30:20 01/25/99
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On January 25, 1999 at 12:14:12, Andrew Williams wrote: >Will, > >>I put a new version on, which finally has eliminated all ply 1 scoring terms. >>That enabled me to add the "valid" part of the hash lookup (not possible with >>interior node scoring), and both together have sped it up and improved play. >>The pv in particular is more reasonable, and I get more correct guesses on the >>opponent's move. >> > >Yes. This is what I have been doing over the last couple of months. I too >had a lot of ply 1 (and 3) bonuses, which I took out after your question in >this group a few months ago. This forum really works. > > >>But, more likely, it was just a fluke. <g> The first game I recall you put all >>your pieces back on your first rank, then a kside attack got you. The second >>game also had a kside attack, I think. Any changes in that area? >> > >Two main changes recently: > >1) I now use TT information from previous searches. I just clear the TTs >when I enter the endgame and after either side castles. I don't understand. Couldn't you just as easily find positions that had castling in the TT way before you actually castle in your position? What is so special about castling? Is it that the number of transpositions drop drastically after castling (even though some would still be there)? Also, wouldn't castling often be within opening book moves so you are not yet in your TT? Statistically, it would be interesting to calculate percentage of TT hits when the program clears out the entries in the TT after making a move (during your opponent's time), during special cases only (such as castling and endgames), and when previous search infomation is there. KarinsDad > >2) New pawn scoring, which is specifically intended to stop the sort of thing >you describe above. This needs tuning I think! > > >Andrew
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